Particles in indoor air are measured in microns
MERV 12 furnace air conditioning filters are comparable to HVAC filters with the rating of MPR 1500-1900
Actual Size: 11 1/2 x 24 1/2 x 1/2 (11
Nordic Pure 12x18x1 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer
Replaces Trion Air Bear Cub filters and others that require an actual 3" depth and ideal for helping keep equipment working efficiently and reducing odors
17x20x1 MERV 13 Plus Carbon AC Furnace Filters Number Per Box:12 Particles in indoor air areActual Size: 16 1 2 x 19 1 2 x 3 4 (16. 5 x 19. 5 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, smog, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers looking for superior filtration but needing an odor control element Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 13 is equivalent to MPR 2200 2400